The general formula of the organic compounds ‘A’, ‘B’ and ‘C’ is CnH2n. Their boiling points are – 162 ºC, – 42.2ºC and – 0.5 ºC respectively. Based on this information answer the following : (a) Which type of compounds ‘A’, ‘B’ and ‘C’ are and why ? (b) Which of these has maximum number of carbon atoms in the molecule and why ? (c) Write the name and structural formula of the second member of this series.
Answers
■CnH2n is general formula for alkene
■ A B and C are unsaturated hydrocarbons as they are alkenes
■ second is CnH2n .... C2H4 ....
C2H4 is ethene ....
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As the general recipe of A, B and C is CnH2n, they all have a place with the homologous arrangement of alkene.
In a straight chain hydrocarbons, if the atomic mass is high, its liquefying point and breaking point will likewise be high.
Since, the breaking point of B is most elevated, in this manner, it has greatest number of carbon particles and therefore have the most astounding atomic mass.
Though, in the event of C, it has most minimal breaking point. Accordingly, it contains least number of carbon iotas and along these lines lower atomic mass when contrasted with B and A.